From Longman Dictionary of Contemporary Englishnot at allnot at allBritish English spokenTHANK used to be polite when someone has thanked you or asked you to do something ‘Would you mind helping me with my suitcase?’ ‘Not at all.’ → not
Examples from the Corpus
not at all• I do not like his attitude at all.• Their steady, reliable earnings growth attracts investors primarily when the economy is growing slowly or not at all.• No, no, no, that's wrong. That's not what I meant at all.• But better in the nick of time than not at all.• Everything is preserved perfectly or not at all.• For example, the abstract either comes first or not at all.• She pushes down her dress but is not at all embarrassed.• She's not at all happy about the situation.• I see her again, very straight, dressed in light colors, not at all showy.• The changes were not at all surprising.• He's not at all well. 